Chemistry and structure of coal-derived asphaltenes, Phase I. Quarterly progress report, January--March 1976. [4 refs]
Coal liquids have been separated by solvent fractionation into three crude fractions: pentane-soluble (gas oil and resin), pentane-insoluble and benzene-soluble (crude asphaltene), and benzene insoluble (carbene and carboid). The crude asphaltene fractions have been further separated by solvent elution chromatography on silica gel into two major fractions (benzene eluted and diethyl ether eluted). The great majority of these materials were characterized as to elemental analyses, molecular weight, metal analyses, color intensity, NMR--hydrogen percentages by proton type, carbon aromaticity by x-ray diffraction, and infrared spectral analysis. The two major asphaltene fractions obtained from Synthoil by elution from silica gel with benzene and diethyl ether compare relatively well with respect to ultimate analysis with the two components isolated by Sternberg et al. by treatment of Synthoil asphaltenes dissolved in toluene with dry HCl. If these components prove to be similar, then silica gel chromatography offers a mild, chlorine-free procedure for separating asphaltenes into acidic and basic components.
- Research Organization:
- University of Southern California, Los Angeles (USA)
- Sponsoring Organization:
- US Energy Research and Development Administration (ERDA)
- OSTI ID:
- 7211528
- Report Number(s):
- FE-2031-3
- Country of Publication:
- United States
- Language:
- English
Similar Records
Chemistry and structure of coal-derived asphaltenes, Phase II. Quarterly progress report, January--March 1977. [15 refs]
Chemistry and structure of coal-derived asphaltenes: Phase I. Quarterly progress report, April--June 1976. [Fractionation into 5 fractions]
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL COMPOSITION
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
COHERENT SCATTERING
DIFFRACTION
EXTRACTION
FRACTIONATION
INFRARED SPECTRA
LIQUEFACTION
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
PETROCHEMICALS
PETROLEUM PRODUCTS
POLYMERS
RESINS
SCATTERING
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
SYNTHOIL PROCESS
TAR
X-RAY DIFFRACTION